diff --git a/ChangeLog b/ChangeLog
index 412cd3bd45..8f19057652 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Feb 20 18:59:47 2004  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* lib/irb/init.rb (IRB::IRB.parse_opts): add -I option to
+	  irb. [ruby-dev:39243]
+
 Fri Feb 20 12:55:27 2004  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* io.c (pipe_open): fix typo.
@@ -94,6 +99,14 @@ Wed Feb 18 17:18:01 2004  WATANABE Hirofumi  <eban@ruby-lang.org>
 
 	* ext/win32ole/win32ole.c: need to include <olectl.h> on Cygwin.
 
+Wed Feb 18 10:40:38 2004  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* sprintf.c (rb_f_sprintf): sign bit extension should not be done
+	  if FPLUS flag is specified.  [ruby-list:39224]
+
+	* sprintf.c (rb_f_sprintf): do not prepend dots for negative
+	  numbers if FZERO is specified.  [ruby-dev:39218]
+
 Wed Feb 18 10:23:34 2004  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* sprintf.c (rb_f_sprintf): clean up.
diff --git a/lib/irb/init.rb b/lib/irb/init.rb
index 1df2926fa5..8b6ff6264d 100644
--- a/lib/irb/init.rb
+++ b/lib/irb/init.rb
@@ -126,6 +126,9 @@ module IRB
       when "-r"
 	opt = ARGV.shift
 	@CONF[:LOAD_MODULES].push opt if opt
+      when "-I"
+        opt = ARGV.shift
+        $LOAD_PATH.push opt if opt
       when /^-K(.)/
 	$KCODE = $1
       when "--inspect"
diff --git a/lib/irb/lc/help-message b/lib/irb/lc/help-message
index 42e861a343..efc00bf148 100644
--- a/lib/irb/lc/help-message
+++ b/lib/irb/lc/help-message
@@ -14,6 +14,7 @@ Usage:  irb.rb [options] [programfile] [arguments]
   -m		    Bc mode (load mathn, fraction or matrix are available)
   -d                Set $DEBUG to true (same as `ruby -d')
   -r load-module    Same as `ruby -r'
+  -I path           Specify $LOAD_PATH directory
   --inspect	    Use `inspect' for output (default except for bc mode)
   --noinspect	    Don't use inspect for output
   --readline	    Use Readline extension module
diff --git a/lib/irb/lc/ja/help-message b/lib/irb/lc/ja/help-message
index 1cf980f6ba..4b710c7788 100644
--- a/lib/irb/lc/ja/help-message
+++ b/lib/irb/lc/ja/help-message
@@ -14,6 +14,7 @@ Usage:  irb.rb [options] [programfile] [arguments]
   -m		    bcモード(分数, 行列の計算ができる)
   -d                $DEBUG をtrueにする(ruby -d と同じ)
   -r load-module    ruby -r と同じ.
+  -I path           $LOAD_PATH に path を追加する.
   --inspect	    結果出力にinspectを用いる(bcモード以外はデフォルト). 
   --noinspect	    結果出力にinspectを用いない.
   --readline	    readlineライブラリを利用する.
diff --git a/sprintf.c b/sprintf.c
index 73282b88a2..6de45618c8 100644
--- a/sprintf.c
+++ b/sprintf.c
@@ -544,7 +544,7 @@ rb_f_sprintf(argc, argv)
 			    if (base == 10) {
 				rb_warning("negative number for %%u specifier");
 			    }
-			    else if (!(flags&FPREC)) {
+			    else if (!(flags&(FPREC|FZERO))) {
 				strcpy(s, "..");
 				s += 2;
 			    }
@@ -602,7 +602,7 @@ rb_f_sprintf(argc, argv)
 				remove_sign_bits(++s, base);
 				tmp = rb_str_new(0, 3+strlen(s));
 				t = RSTRING(tmp)->ptr;
-				if (!(flags&FPREC)) {
+				if (!(flags&(FPREC|FZERO))) {
 				    strcpy(t, "..");
 				    t += 2;
 				}
@@ -660,7 +660,7 @@ rb_f_sprintf(argc, argv)
 		else {
 		    char c;
 
-		    if (bignum && !RBIGNUM(val)->sign)
+		    if (!sign && bignum && !RBIGNUM(val)->sign)
 			c = sign_bits(base, p);
 		    else
 			c = '0';